Neuroendocrine Correlates of Circadian Rhythmicity in Crustaceans

Aréchigá, Hugo; Cortés, José Luis; Garcı́a, Ubaldo; Rodrı́guez-Sosa, Leonardo

doi:10.1093/icb/25.1.265

Cited by 43 publications

(23 citation statements)

References 8 publications

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“…Several crustacean clocks have previously been reviewed with regard to both circadian (10,(19)(20)(21)(22) and circatidal (3,4,6,8,19) rhythms, just to mention only some more recent or extensive works. Whilst ultradian rhythms have been detected in many systems (12), their functional significance has yet to be determined.…”

Section: Chronobiological Systems In Crustaceamentioning

confidence: 99%

“…the lamina ganglionaris, the medulla externa, the medulla interna (= lobula), and finally the medulla terminalis, which is in fact part of the lateral protocerebrum of the brain (123)(124)(125). The eyestalk proved to be an important source of neuropeptides and small modulators such as serotonin and melatonin involved in circadian regulation, that affect rhythms of locomotion, pigment distribution, and eye sensitivity (10,20,21,95). Most of the neurosecretion within the eyestalk ganglia that is of relevance for circadian rhythmicity appears to be attributed to the well-established neurosecretory X-organ-sinus gland system (XOSG) (126) (e.g.…”

Section: Eyestalk Systems and Mediators Of Circadian Rhythmicitymentioning

confidence: 99%

“…In decapods, up to twenty XOSG neurons project to the sinus gland, which contains the highest amounts of identified RPCH, and from which the peptide is preferably released at night (20,127,151). Furthermore, a distinct group of 8-12 RPCH-neurosecretory neurons next to the lateral medulla externa of crayfish have been traced to extensive branches within this neuropil and in the lamina ganglionaris.…”

Section: Red Pigment Concentrating Hormone (Rpch)mentioning

confidence: 99%

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Circadian clocks in crustaceans: identified neuronal and cellular systems

Strauß

Dircksen²

2010

Front Biosci

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Circadian rhythms are known for locomotory and reproductive behaviours, and the functioning of sensory organs, nervous structures, metabolism and developmental processes. The mechanisms and cellular bases of control are mainly inferred from circadian phenomenologies, ablation experiments and pharmacological approaches. Cellular systems for regulation summarised here comprise the retina, the eyestalk neuroendocrine X-organ-sinus gland system, several neuropeptides such as red pigment concentrating, hyperglycaemic and pigment-dispersing hormones, and factors such as serotonin and melatonin. No master clock has been identified, but a model of distributed clockwork involves oscillators such as the retinular cells, neurosecretory systems in the optic lobes, putative brain pacemakers, and the caudal photoreceptor. Extraretinal brain photoreceptors mediate entrainment. Comparative analyses of clock neurons and proteins known from insects may allow the identification of candidate clock neurons in crustaceans as putative homologues in the two taxa. Evidence for the existence of "insect-like" intracellular clock proteins and (light sensitive) transcription factors is scarce, but clock-, period-, and cryptochrome-gene products have been localised in the CNS and other organs rendering further investigations into crustacean clockwork very promising.

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Section: Chronobiological Systems In Crustaceamentioning

confidence: 99%

Section: Eyestalk Systems and Mediators Of Circadian Rhythmicitymentioning

confidence: 99%

Section: Red Pigment Concentrating Hormone (Rpch)mentioning

confidence: 99%

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Circadian clocks in crustaceans: identified neuronal and cellular systems

Strauß

Dircksen²

2010

Front Biosci

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“…Circadian rhythms have been reported in a variety of physiological functions of crayfish ranging from behavioral [37-39,41,43] to cellular [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] and molecular levels [12][13][14][15][16][17][18][19]. Many of these are thought to be under the control of endogenous circadian oscillators.…”

Section: Discussionmentioning

confidence: 99%

“…Crustaceans have been known to show circadian rhythms in hormonal secretion [12][13][14][15], neurosecretion [16], biogenic amine contents and actions in the central nervous system [17][18][19], mechanoreceptor sensitivity [20], photoreceptor sensitivity [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] and locomotor activity [37][38][39][40][41][42][43]. A previous study in the crayfish Procambarus clarkii showed that the circadian rhythm in leg movement disappeared when the circumesophageal commissures were surgically lesioned bilaterally, thus experimentally demonstrating the importance of descending signals from the brain to posterior ganglia [38].…”

Section: Introductionmentioning

confidence: 99%

Chronic electromyographic analysis of circadian locomotor activity in crayfish

Tomina

Kibayashi

Yoshii

et al. 2013

Behavioural Brain Research

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Animals generally exhibit circadian rhythms of locomotor activity. They initiate locomotor behavior not only reflexively in response to external stimuli but also spontaneously in the absence of any specific stimulus. The neuronal mechanisms underlying circadian locomotor activity can, therefore, be based on the rhythmic changes in either reflexive efficacy or endogenous activity. In crayfish Procambarus clarkii, it can be determined by analyzing electromyographic (EMG) patterns of walking legs whether the walking behavior is initiated reflexively or spontaneously. In this study, we examined quantitatively the leg muscle activity that underlies the locomotor behavior showing circadian rhythms in crayfish. We newly developed a chronic EMG recording system that allowed the animal to freely behave under a tethered condition for more than 10 days. In the LD condition in which the animals exhibited LD entrainment, the rhythmic burst activity of leg muscles for stepping behavior was preceded by non-rhythmic tonic activation that lasted for 1323 ± 488 msec when the animal initiated walking. In DD and LL free-running conditions, the pre-burst activation lasted for 1779 ± 31 and 1517 ± 39 msec respectively. In the mechanical stimulus-evoked walking, the pre-burst activation ended within 79 ± 6 msec. These data suggest that periodic changes in the crayfish locomotor activity under the condition of LD entrainment or free-running are based on activity changes in the spontaneous initiation mechanism of walking behavior rather than those in the sensori-motor pathway connecting mechanoreceptors with leg movements.

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Invertebrate Endocrinology

Landau

Biggers

Laufer

1997

Comprehensive Physiology

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The sections in this article are: Growth and Morphogenetic Factors Insects Crustaceans Molluscs Other Invertebrates Regenerative Factors Crustaceans Insects Cnidarians Platyhelminths Annelids Echinoderms Others Pigmentary Factors Crustaceans Insects Osmoregulatory Factors Factors that May Increase Osmotic Pressure Factors that May Decrease Osmotic Pressure Metabolic Factors Biogenic Amines JHs and Farnesylacetone Adipokinetic Hormones and RPCH Crustacean Hyperglycemic Hormones Other Metabolic Factors Reproductive Factors Flatworms, Nemertines, and Nematodes Molluscs Crustaceans Insects Other Arthropods Annelids Echinoderms Behavioral Factors In Vitro Studies In Vivo Studies Pheromones Summary

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Neuroendocrine Correlates of Circadian Rhythmicity in Crustaceans

Cited by 43 publications

References 8 publications

Circadian clocks in crustaceans: identified neuronal and cellular systems

Circadian clocks in crustaceans: identified neuronal and cellular systems

Chronic electromyographic analysis of circadian locomotor activity in crayfish

Invertebrate Endocrinology

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